I've bisected the problem down to commit c35a4a858d0616e7817026d88f377c7201ad449a ("block: fix an integer overflow in logical block size", upstream ad6bf88a6c19a39fb3b0045d78ea880325dfcf15).
I don't know what the exact problem is with the commit, but seems to be in the area of fs/block_dev.c set_init_blocksize() calling bdev_logical_block_size() which the offending commit touches. # bad: [a78d21bd8bb58c158f73108eb7d7402619fcae3d] UBUNTU: Ubuntu-4.15.0-91.92 # good: [d5b8ff45eabff3cb2232a2eea38a862edc647ab8] UBUNTU: Ubuntu-4.15.0-88.88 git bisect start 'Ubuntu-4.15.0-91.92' 'Ubuntu-4.15.0-88.88' # bad: [c04c6d87ca3a7e2c8019e0a2349fcf1175ffcce0] KVM: PPC: Release all hardware TCE tables attached to a group git bisect bad c04c6d87ca3a7e2c8019e0a2349fcf1175ffcce0 # good: [9a6b3cea5792f94f03f579c668a60eb4ddd209f0] dt-bindings: reset: meson8b: fix duplicate reset IDs git bisect good 9a6b3cea5792f94f03f579c668a60eb4ddd209f0 # bad: [6783f1bf22bb55bcd2628d7cabeacc9c720971e6] ALSA: usb-audio: update quirk for B&W PX to remove microphone git bisect bad 6783f1bf22bb55bcd2628d7cabeacc9c720971e6 # skip: [c4099e7e88621e82a5b3a5b0a2e3d6d8eee4e8e0] ptp: free ptp device pin descriptors properly git bisect skip c4099e7e88621e82a5b3a5b0a2e3d6d8eee4e8e0 # bad: [3222d8b5d803ed733dba2da03b595cf90c871fe6] drm/nouveau/mmu: qualify vmm during dtor git bisect bad 3222d8b5d803ed733dba2da03b595cf90c871fe6 # skip: [3db4efba8dea644e54e339ac2e46b497aea93638] NFC: pn533: fix bulk-message timeout git bisect skip 3db4efba8dea644e54e339ac2e46b497aea93638 # skip: [211ff6ef5f2f19d86d35dcbb94d4b09ab7de00fc] batman-adv: Fix DAT candidate selection on little endian systems git bisect skip 211ff6ef5f2f19d86d35dcbb94d4b09ab7de00fc # skip: [3cb4cbc154b57c2fb842fbacc6ea4bd625ce680f] perf hists: Fix variable name's inconsistency in hists__for_each() macro git bisect skip 3cb4cbc154b57c2fb842fbacc6ea4bd625ce680f # good: [1d9d2aae71b2d1c18d7d69c4850ca57ebd1e6fc1] clk: Don't try to enable critical clocks if prepare failed git bisect good 1d9d2aae71b2d1c18d7d69c4850ca57ebd1e6fc1 # skip: [37f1c7c4bf8eaf03f0e07152f55e0dda97bd52e8] cfg80211: check for set_wiphy_params git bisect skip 37f1c7c4bf8eaf03f0e07152f55e0dda97bd52e8 # good: [43cdcecf3a1bd5fdf9cbce0f3908cdde789c7ffd] ALSA: seq: Fix racy access for queue timer in proc read git bisect good 43cdcecf3a1bd5fdf9cbce0f3908cdde789c7ffd # bad: [7a10b28e6122e12323da46732fc345d476a21829] ARM: dts: am571x-idk: Fix gpios property to have the correct gpio number git bisect bad 7a10b28e6122e12323da46732fc345d476a21829 # good: [31e3c075719a3afe5ffd2b9b8e1f18e07255bd96] Fix built-in early-load Intel microcode alignment git bisect good 31e3c075719a3afe5ffd2b9b8e1f18e07255bd96 # bad: [c35a4a858d0616e7817026d88f377c7201ad449a] block: fix an integer overflow in logical block size git bisect bad c35a4a858d0616e7817026d88f377c7201ad449a # first bad commit: [c35a4a858d0616e7817026d88f377c7201ad449a] block: fix an integer overflow in logical block size -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867916 Title: Regression in kernel 4.15.0-91 causes kernel panic with Bcache To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1867916/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs